Leaving tonality. Early Second Viennese School. Harmonic experiments: Wagner, Satie, Schoenberg. Folk music as material: Vaughn-Williams. Superimposition and clusters in Ives. Skriabin and Bartok. African influence in Debussy. Early Webern. Analysis of Debussy and Stravinsky. Sixth lecture of the course "The Contemporary Era" by Antioch College Professor John Ronsheim. This course traces the history of 20th Century music until about 1970.